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您的检索式：作者名="Martin Given"
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| 1 | Octavinyl polyhedral oligomeric silsesquioxane on tailoring the DC electrical characteristics of polypropylene显示文摘This work reports the effect of octavinyl polyhedral oligomeric silsesquioxane(OvPOSS)on tuning the electrical performance of polypropylene(PP).OvPOSS with different content are introduced into PP using the solution method.The microstructural morphology,crystallinity behaviour,breakdown strength,DC conductivity,space charge formation,and trapping level distribution are measured.The results indicate that the OvPOSS nanofiller can be dispersed uniformly with a doping content of 2.0 phr or less.The DC conductivity is decreased,and the breakdown strength of OvPOSS/PP nano-composites is significantly increased.The space charge accumulation of the OvPOSS/PP nanocomposites is significantly suppressed due to the introduction of deeper traps by the OvPOSS nanofiller.Finally,the experimental results demonstrate that the OvPOSS nanofiller can greatly increase the electrical performance of the base PP and the OvPOSS/PP nanocomposites have much potential for HVDC applications.They further demonstrate that the PP is environmental‐friendly due to its thermo‐plastic property,which can be recycled after the manufacture. | Xiaosi Lin Wah Hoon Siew John Liggat Martin Given Jinliang He | 2022 | High Voltage2022，7，1： | 2 |
| 2 | Effect of different surface treatment agents on the physical chemistry and electrical properties of polyethylene nano-alumina nanocomposites显示文摘Generally,the electrical properties of nanocomposite are affected by the type,size,filling concentration and surface treatment process of the nanoparticle.In this study,nanocomposites of polyethylene(PE)with varying filling contents of nanoalumina particles were prepared by the melting blending method and three different kinds of coupling agents were applied for surface modification properties of the nanoparticles.Two of them were silane based and the other was titanate based.The effect of different coupling agents on the dielectric properties was studied.Fourier-transform infrared spectroscopy and thermo-gravimetric analysis were used to verify their compositions.Scanning electron microscope and polarised optical microscopy were used for morphology study.Dielectric permittivity,direct current(DC)volume resistivity and DC breakdown strength characterised their improved insulation performance with nano-alumina as filler.Thermal stimulated current results revealed that adding nano-alumina particles into low-density PE could provide more deep traps and increase DC resistivity. | Xuhui Duan Wah Hoon Siew Martin Given John Liggat Jinliang He | 2020 | High Voltage2020，5，4： | 2 |
| 3 | Mobility of charge carriers in mineral oil and ester fluids显示文摘New,more stringent environmental requirements for electrical insulation liquids have led to the development of novel,more environment‐friendly liquid dielectrics.Ester fluids,introduced several decades ago,provide a viable alternative to traditional mineral insu-lating liquids.In order to expand the practical applications of these novel dielectric fluids,their dielectric and electrical parameters should be established.One of the critical pa-rameters that affects and governs the development of pre‐breakdown processes in insulating liquids is the mobility of charge carriers.In the present paper,the mobility of charge carriers in commercially available synthetic and natural insulating ester fluids and in a mineral insulating oil were obtained using two methods,the time of flight and the space charge saturation current methods.The mobility was obtained for a wide range of electrical field magnitudes.It was found that the mobility of charge carriers is greater in the mineral oil than in both,the natural and synthetic,ester fluids.It was also established that the mobility is higher for higher applied electric field.The results of this work will help in characterizing liquid dielectrics and in optimizing high‐voltage systems in which liquid dielectrics,including natural and synthetic ester fluids,are used. | Qingjiang Xue Igor Timoshkin Mark PWilson Martin Given Scott J.MacGregor | 2021 | High Voltage2021，6，6： | 1 |
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